Fat Sass Switchback Challenge

Millburn, United States • 5 Oct 2025

The Fat Sass Switchback Challenge is a trail running event held in Millburn, New Jersey, at the South Mountain Reservation's Locust Grove Picnic Area. Scheduled for October 5, 2025, it offers three race options: a 5K, a 3-hour, and a 6-hour challenge. Participants run a 1-mile loop featuring a steep 300-foot elevation gain, with half the course ascending the Lenape Trail and the other half descending switchbacks on technical, rocky terrain. The event is a BYO (bring your own) affair, providing only water and bibs, with no swag or awards. All proceeds support Bigger Than The Trail, a nonprofit offering free therapy to those in need. Visit the organization's website for the most recent information.

Race information

6 hr
6 Hours
3 hr
3 Hours
5 km
Visit the organization's website for the most recent information.
Trail runs nearby

Pinky’s Rock n Rolla is a unique 4-mile trail race held in Richmond Hill, New York, featuring actual hiking trails rather than bridle paths or gravel roads. The course, located in Forest Park, offers a challenging and scenic run through naturally carved terrain shaped by glaciation, including a 100-..

The Squatchy Surprise is a unique trail running event held at South Mountain Reservation in Millburn, New Jersey, on July 26, 2025. Featuring 12-hour, 6-hour, and 3-hour options, the race challenges participants' endurance and strategy with a twist: runners draw colored golf balls before each loop t..

The MCW Westfield Ultra is an annual endurance running event held at Tamaques Park in Westfield, New Jersey. Participants can choose from 3, 6, 9, 12, or 24-hour race durations, aiming to complete as many laps as possible on a 0.8-mile loop featuring both pavement and gravel surfaces. The race offer..

The Interstate 17 Trail Run in Closter, NJ, is a challenging 17-mile race featuring over 5,000 feet of elevation change. Set along rugged, technical trails with stunning views of the Hudson River from New Jersey to New York, the course includes a mile out-and-back on a closed road followed by four l..

The Dirty Dozen 50K is a challenging ultramarathon held in New York City, featuring a 50-kilometer distance composed of 12 hilly loops in Forest Park. Known as one of the tougher ultra-races in the city, it tests both physical endurance and mental toughness. The course's repetitive loop format and e..

The Barn-B-Q Trail Festival, held in Berkeley Heights, New Jersey, is a unique outdoor event combining trail running or hiking with a lively barn party. Set in the historic Deserted Village of Feltville within Watchung Reservation, participants can enjoy self-guided trail tours ranging from 2 to 6 m..